@book { ReformingFederalismForeignExperiencesforaReforminGermany,
    title = "Reforming Federalism – Foreign Experiences for a Reform in Germany",
    author = "Gerhard {Robbers}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100131"
}